3-38. Fuel Lines
a. Refer to figure 3-31 for removal of fuel supply lines.
3-39. Electrical Governor Hydraulic Actuator
3-40. Mechanical Governor - Fuel Injection Pump
a. The fuel injection pump governor assembly is
lubricated through the engine lubricating system. No
lubrication service on the injection pump and governor
assembly is required.
b. Calibrating and test stands, and special tools are
required to test, adjust, and repair the fuel injection
pump and governor assembly.
adjusting and installation are to be accomplished at
Field or Depot Level.
3-41. Checking Fuel System
"Missing" or uneven running of the engine, excessive
vibration, and loss of power are indications of
Figure 3-27. Fuel transfer pump, removal and
insufficient fuel supply to the engine. Before performing
any of the following checks, make certain there is an
ample supply of clean fuel in the fuel tank and the day
tank and that the fuel selector valve is open.
a. Check for Admission of Air Into System.
Loosen vent screw in top of fuel filter (F2, fig. 3-17)
Crank engine with starter.
containing bubbles flows from around the vent screw, air
being drawn into the system on the suction side of the
fuel transfer pump is indicated. Correct this condition by
tightening any loose low pressure fuel line connections
between day tank and fuel transfer pump.
b. Check for Clogged Fuel Filters and Clogged or
Collapsed Fuel Lines. Loosen the vent screw in top of
F2 fuel filter shell retaining nut. Crank engine with
starter. If a full flow of fuel is not obtained from around
Figure 3-28. Electric fuel pump service.
3-37. Day Tank Float Assembly